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usr
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src
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linux-headers-6.8.0-83
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arch
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riscv
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include
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asm
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smp.h
/* SPDX-License-Identifier: GPL-2.0-only */ /* * Copyright (C) 2012 Regents of the University of California */ #ifndef _ASM_RISCV_SMP_H #define _ASM_RISCV_SMP_H #include <linux/cpumask.h> #include <linux/irqreturn.h> #include <linux/thread_info.h> #define INVALID_HARTID ULONG_MAX struct seq_file; extern unsigned long boot_cpu_hartid; #ifdef CONFIG_SMP #include <linux/jump_label.h> /* * Mapping between linux logical cpu index and hartid. */ extern unsigned long __cpuid_to_hartid_map[NR_CPUS]; #define cpuid_to_hartid_map(cpu) __cpuid_to_hartid_map[cpu] /* print IPI stats */ void show_ipi_stats(struct seq_file *p, int prec); /* SMP initialization hook for setup_arch */ void __init setup_smp(void); /* Hook for the generic smp_call_function_many() routine. */ void arch_send_call_function_ipi_mask(struct cpumask *mask); /* Hook for the generic smp_call_function_single() routine. */ void arch_send_call_function_single_ipi(int cpu); int riscv_hartid_to_cpuid(unsigned long hartid); /* Enable IPI for CPU hotplug */ void riscv_ipi_enable(void); /* Disable IPI for CPU hotplug */ void riscv_ipi_disable(void); /* Check if IPI interrupt numbers are available */ bool riscv_ipi_have_virq_range(void); /* Set the IPI interrupt numbers for arch (called by irqchip drivers) */ void riscv_ipi_set_virq_range(int virq, int nr, bool use_for_rfence); /* Check if we can use IPIs for remote FENCEs */ DECLARE_STATIC_KEY_FALSE(riscv_ipi_for_rfence); #define riscv_use_ipi_for_rfence() \ static_branch_unlikely(&riscv_ipi_for_rfence) /* Check other CPUs stop or not */ bool smp_crash_stop_failed(void); /* Secondary hart entry */ asmlinkage void smp_callin(void); /* * Obtains the hart ID of the currently executing task. This relies on * THREAD_INFO_IN_TASK, but we define that unconditionally. */ #define raw_smp_processor_id() (current_thread_info()->cpu) #if defined CONFIG_HOTPLUG_CPU int __cpu_disable(void); static inline void __cpu_die(unsigned int cpu) { } #endif /* CONFIG_HOTPLUG_CPU */ #else static inline void show_ipi_stats(struct seq_file *p, int prec) { } static inline int riscv_hartid_to_cpuid(unsigned long hartid) { if (hartid == boot_cpu_hartid) return 0; return -1; } static inline unsigned long cpuid_to_hartid_map(int cpu) { return boot_cpu_hartid; } static inline void riscv_ipi_enable(void) { } static inline void riscv_ipi_disable(void) { } static inline bool riscv_ipi_have_virq_range(void) { return false; } static inline void riscv_ipi_set_virq_range(int virq, int nr, bool use_for_rfence) { } static inline bool riscv_use_ipi_for_rfence(void) { return false; } #endif /* CONFIG_SMP */ #if defined(CONFIG_HOTPLUG_CPU) && (CONFIG_SMP) bool cpu_has_hotplug(unsigned int cpu); #else static inline bool cpu_has_hotplug(unsigned int cpu) { return false; } #endif #endif /* _ASM_RISCV_SMP_H */
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